I have a 1994 for ranger with a V6 4.0L engine with over 160000 miles, i resently had it in the shop where they replace the spark plugs, ever since the truck runs rough and it looks like they might have cross a few of my wires around. if i could get a spark plug wiring diagram, that would be very helpfull. the engine does not have a distrubator, instead is has the coil packs